156 



ORDER HEMIPTERA 



The nymphs are at first without trace of wing pads, but in 

 successive instars the wing pads increase in size. The 

 different instars are shown in the accompanying figure. 



Fig. 110. — Anasa Iristis: a, mature female; b, side view of head, show- 

 ing haustellum; c, abdominal segments of male; d, same of female; a, 

 twice natural size; b, c, d, slightly more enlarged. (From Chittenden, 

 Div. Ent., U. S. Dcpt. Ag.) 





Fig. 111. — Anasa trislis nymphs: a, newly hatched; b, second stage; c, 

 third stage; d, fourth stage; e, fifth stage — all about twice natural size. 

 (From Chittenden, Div. Ent., U. S. Dept. Ag ) 



Box Elder Bug (Leptocoris trivittatus) . — The box elder bug 

 is black with red lines, and since this species has been migrat- 



